<!DOCTYPE html>
<html lang="zh">
<head>
    <meta charset="UTF-8">
    <style type="text/css">
        * {
            margin: 0;
            padding: 0;
        }

        body {
            width: 200px;
            height: 100px;
        }

        div {
            line-height: 100px;
            font-size: 42px;
            text-align: center;
        }
    </style>
    <script src="../../libs/jquery/jquery-2.2.4.min.js" type="text/javascript"></script>
    <script src="index.js" type="text/javascript"></script>
</head>
<body>
    <div id="clock_div">
        hello world
    </div>
</body>
</html>